That's awesome man! Looks like you're on the right track, just be very sterile and clean! I've grown b+ before and it's pretty good, fast, fat, and fairly potent. One thing my partners and I found out about was using coco coir in the cakes and wow it made the hugest difference ever, the jars colonized 2x as fast. Also, look into liquid cultures for some fast growing mycellium as well.
Good luck!
Mastershake I can give you a much better method of using Liquid Culture if you want.. It's actually easier and way way more less likely to contaminate.. Also uses the same spore syringe type style.. So if interested let me kno and I can help.. Sry to hijack this thread..